10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt History of the Atom Subatomic Particles ScientistsNumbersElectrons
Last of the three subatomic particles to be discovered.
The neutron
Series of experiments used to discover the nucleus of the atom.
The Gold Foil Experiment
J. J. Thomson’s model of the atom was known as _________ model.
chocolate chip cookie
Bohr discovers that the _________ is separated into different energy levels.
electron cloud
Greek philosopher who first came up with the idea of an “atomos”.
Democritus
The particle that has a positive charge.
The proton
The particle not found in the nucleus.
The electron
The mass of the neutron
One (1) A.M.U.
Other particle found in the nucleus besides the neutron
The proton
The particle that has no mass
The electron
Gold Foil Experiment
Ernest Rutherford
Discovered the neutron
James Chadwick
Discovered the electron
J. J. Thomson
First scientific atomic theory published in 1808.
John Dalton
Discovered the nucleus
Ernest Rutherford
Same atomic number different mass number
isotopes
Number of protons
Atomic number
Number of neutrons and protons
Mass number
The mass of the nucleus of an atom of Carbon-14.
14 AMU
Atomic number is 80 and the mass number is 200. How many neutrons are in this atom?
120
An atom emits light when one of its electrons
moves from a higher energy level to a lower energy level
Gaining and losing electrons when bonding causes an atom to become charged. A charge atom is called a(n)
ion
Electron with higher energy are located
Farther from the nucleus of the atom
The charge on an ion with 10 electrons and 8 protons.
-2
Subatomic particle that makes up electrical current
an electron